Because everybody likes to pretend they're a superhero sometimes (otherwise comic cons wouldn't exist), these are the newly released Avengers character themed Under Armor Alter Ego compression shirts. They come in Captain America, Hulk, Thor and Iron Man varieties and cost $60 apiece. For reference, that's just about $59 out of my workout shirt budget. All my workout shirts have come from the $1 bin at the thrift store. And some of them even came with PRE-STAINED armpits so I wouldn't have to do it myself. That's quality.
Keep going for shots of all the rest, as well as BONUS Iron Man compression leggings.
Thanks to Joseph F, who informed me squats are the key to a sweet booty. I'm not sure why we were talking about that, but good to know.